<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="./基础样式.css">
    <style>
        div{
            width: 100px;
            height: 100px;
            background-color: red;
            border: 1px solid #000;
            margin: 10px 50px;
        }
        #box{
            width: 200px;
            height: 200px;
            background-color: blue;
        }
        .box{
            background-color: pink;
            border: none;
        }
        .box1{
            width: 100px;
            height: 100px;
            background-image: url(./image/641.webp);
        }
        p{
            width: 200px;
            height: 100px;
            border: 1px solid #000;
            color: red;
            font-size: 16px;
            font-weight: bolder;
            text-align: center;
            line-height: 100px;
        }
        input{
            outline: none;
            border: none;
        }
    </style>
</head>
<body>
    <div>哈哈哈哈哈哈哈哈哈哈哈哈</div>
    <!-- ID选择器 唯一的 -->
    <div id="box">ID选择器</div>
    <!-- class选择器 不唯一 -->
    <div class="box"></div>
    <div class="box1">哈哈哈哈哈哈哈</div>
    <p>我是一个段落标签，哈哈哈哈哈哈哈哈哈</p>
    <input type="text" placeholder="HHHH ">
</body>
</html>